The post briefly caused the price of Bitcoin to spike.
The entrepreneur and reality star failed to disclose she received a $250,000 payment for promoting crypto platform EthereumMax.
In a press release, the SEC said Puneet Dikshit, a partner at McKinsey, was trading illegally in advance of a corporate acquisition by one of the firm's clients in September.
Coinbase users can borrow as much as 40 percent of the value of the Bitcoin in their account, up to $1,000,000, and can use either their bank account or PayPal to access the cash with no fees.
It wants to hold Musk in contempt for posting Tesla production claims.
The Tesla executive says it was just a 'schoolyard spat.'
Elon Musk's $20 Million Settlement for Fraud Charges Add to an Increasingly Bizarre Year for the Billionaire
Musk has become known for his erratic, off-the-cuff online statements, but he's now paying the price and stepping down as Tesla's chairman.
Musk called the SEC lawsuit 'unjustified action.'
The entrepreneurial icon has gone on the record about his personal problems and his unwillingness, or perhaps helplessness, to solve them.
Now we know Theranos didn't have brilliant leadership or breakthrough technology, just an abundance of credulous investors.
The new regulations grant access to vast new reservoirs of capital, but it's early days yet and the best strategies for tapping them are only now becoming discernible.
Dow Jones cites source in developing story.
The company has provided the SEC with information about its accounting for logistics unit as well as operating data from its Singles' Day shopping festival.
Monday's filing indicated that Lending Club had repurchased an additional $3.8 million in loans during the first quarter that did not meet investor criteria.